index.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Quiz</title>
    <link rel="stylesheet" href="css/app.css">
</head>

<body>
    <div class="container ">
        <div id="home" class="flex-center flex-column">
            <h1>Quick quiz</h1>
            <form name="maxQuestions" action="game.html" onsubmit="return setMaxQuestions()" method="GET">
                <p class="default-color">Number of Questions? </p><input class="btn" value="50" type="number" name="nrQuestions">
                <input type="submit" class="btn" value="Play">
            </form>
            <a href="highscores.html" class="btn">High Scores</a>
        </div>
    </div>
</body>
<script src="js/index.js"></script>
</html>